1) Ask
2) Have them hang out in the lobby or somewhere out of sight, then inform them of the room number
3) Pack extremely lightly

Just book it for 2, and if they question you, just say you never knew and if they charge you for extra people at the end, just pay it and get on with your life.

GL!

It totally depends on the place you're going to. If it's a big hotel, they won't even notice a few other people who sneak in with you. If they call you on it at some point, just say you got "lucky"...

On the other hand, if it's a small, family-run place (think New 7th Storey Hotel near Bugis in Singapore) or a hostel, they'll not only notice but will raise hell over it.

Thanks everyone for replying. I'm back from my holiday.

4 people in a room was alright. Didn't have to pay any extra. Maybe cos the hotels were pretty busy.

Funny, I usually don't give any thought to this either but 3 years ago when we stayed at MGM for New Year's, they were insistent on checking. They were not allowing anyone into the hotel after a certain hour who did not have a bracelet on and these were only given to registered guests!

Of course, we had 4 to a room but only paying for 2 so we had to pony up and let them know. First time I had ever seen that. Stuck so well in my head that when we went back again this year for NYE and stayed at Monte Carlo we stupidly informed them that we had 4 in each room! They were checking room keys on 12/31 but we totally could have gotten away with it.

As others have said, the worst that can happen is you get caught, say you didn't know and pay the extra fee (it was 25/pp per night)!

New Year's Eve is an exception - the casinos are trying to control the flow of foot traffic coming off the strip after midnight which is why they check room keys or wrist bands. And, even then, they only check for a while after midnight, after which anybody can get in.

You can run into problems as well with casinos that have popular pools. Mandalay Bay and the Hard Rock tightly control access to the pools, so if you put more people in the room than you're letting on, some of them might not get access to the pool. Of course, this isn't a problem in the winter, but it's something to keep in mind during the warmer months.

just check in 2 people -- get 2 key initially.... next day, go to the lobby and say you lost your keys, and get 2 more. that way all 4 people have keys. security only looks that you have keys and only one person in the group really needs to flash it.

Las Vegas Hilton = $35 per additional guest #3 and #4 per night. Max 4 adults per guest room. There is no max for suites.

A disadvantage if there are 4 of you staying yet only 2 register; say the 2 unregistered guests are away from the registered guests and misplace the room key. Obviously, front desk will not furnish a room key to an unregistered guest.

MGM Grand � max 4 per room. Period. Strictly enforced. Includes Terrace Suites. (this coming from a 10+ year Mansion Specialist I know).

Or split up...two people/1 key should be fine for the pool or the elevator dragons (OK, not really dragons in the sense of the BA Lounge Dragon; I do appreciate the hotel elevator dragons).

Somehow I doubt Dennis Rodman's entourage was all sharing one room... I could be mistaken - times are tough for ex-NBA stars these days...

Yep, you can say that again. Saw Dennis Rodman at Caesars about 6-8 weeks ago and there was only two people with him, so times are getting tough